1997 qx4 infinity

Service engine light came on; had it checked out and knock sensor is the problem. said it would be about 6hrs of labor because the sensor is located in the "valley" of the engine...way out of reach. the part takes a minute to replace, but the labor to get to it shoots the entire cost up to around $700...apparently, it's not an essential part to replace as long as driver keeps eye on the gauges. any thoughts?

thanks for the advice. is mass air flow meter something i can replace on my own or does it require professional attention?thanks for the advice. is mass air flow meter something i can replace on my own or does it require professional attention?

I would change the mass air flow meter firstly.If your knck sensor was the problem then you would have engine running rough.If its not causing any problems when driving then its safe to drive with the light on.

yes you can change the mass air flow meter your self.Its located on the air intake From the air filter to the manifolld.You do not have to have it reprogramed after fitting.Good luck.yes you can change the mass air flow meter your self.Its located on the air intake From the air filter to the manifolld.You do not have to have it reprogramed after fitting.Good luck.

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A knock sensor going is usually indicated by pinging/rattling noise from engine especially when accelerating up a hill or just giving throttle but not kicking down a gear. Not sure what your asking about transmission?